Contact mechanism for testing circuit breaker

Abstract

The utility model provides a contact mechanism for testing a circuit breaker, which comprises a bottom plate, a protection box is arranged above the bottom plate, a ventilation box is arranged at the top of the protection box, a detection window is arranged on the front side of the protection box, a driving motor is arranged on one side of the protection box, and a screw rod is arranged at the output end of the driving motor. The lead screw is rotationally installed on the supporting frame, the bottom of the supporting frame is fixedly installed on the bottom plate, the adjusting base is installed on the lead screw, the electric push rods are installed above and below the adjusting base correspondingly, the guide plates are installed at the driving ends of the electric push rods, and the guide plates are installed on the adjusting base. A guide plate is arranged on the base, a connecting plate is arranged in front of the guide plate, a fixing piece is arranged on one side of the connecting plate, and the contact plate is arranged on the connecting plate through the fixing piece. Compared with the prior art, the circuit breaker detection device has the following beneficial effects that the contact plate on the circuit breaker detection device is convenient to replace, and the replacement efficiency of the contact plate is improved.

Description

Technical Field

[0001] The utility model relates to a contact mechanism for circuit breaker testing, belonging to the field of circuit breaker testing. Background Art

[0002] A circuit breaker is a switching device that can close, carry and interrupt the current under normal circuit conditions and can close, carry and interrupt the current under abnormal circuit conditions within a specified time. Circuit breakers can be used to distribute electrical energy, start asynchronous motors infrequently, and protect power lines and motors. When they have serious overloads or short circuits and undervoltage faults, they can automatically cut off the circuit. Its function is equivalent to the combination of a fuse switch and an over-underheating relay, and generally no parts need to be changed after breaking the fault current. During the functional test of the circuit breaker, the busbar terminals of the circuit breaker need to be energized for a long time to obtain the test values ​​of each function. This process requires The contact between the busbar terminal of the circuit breaker and the docking contact piece is required to be stable and reliable, to ensure the accuracy of the circuit breaker test value, and to ensure that the outer surface of the busbar terminal will not change significantly due to the test. In the prior art, since the contact plate is in contact with the busbar terminal for a long time, and the contact plate has to constantly rub against the busbar terminals of circuit breakers of different models, during the process of circuit breaker detection, the surface of the contact plate will be more or less worn, and the installation between the contact plate and the connecting plate is more troublesome. When the surface of the contact plate is worn, it is not convenient to replace it in time, which reduces the circuit breaker detection efficiency. Therefore, it is necessary to design a contact mechanism for circuit breaker testing that can improve the contact plate replacement efficiency. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model aims to provide a contact mechanism for circuit breaker testing to solve the problems raised in the above background technology. The utility model facilitates replacement of the contact plate on the circuit breaker detection device and improves the replacement efficiency of the contact plate.

[0004] In order to achieve the above-mentioned purpose, the utility model is implemented through the following technical scheme: a contact mechanism for circuit breaker testing, comprising a base plate, a protective box is installed above the base plate, a ventilation box is installed on the top of the protective box, a detection window is opened on the front side of the protective box, a drive motor is installed on one side of the protective box, a screw rod is installed on the output end of the drive motor, the screw rod is rotatably installed on a support frame, the bottom of the support frame is fixedly installed on the base plate, an adjustment base is installed on the screw rod, electric push rods are installed above and below the adjustment base, a guide plate is installed on the driving end of the electric push rod, the guide plate is installed on the adjustment base, a connecting plate is installed in front of the guide plate, a fixing piece is installed on one side of the connecting plate, the fixing piece installs the contact plate on the connecting plate, and a power supply box is installed in the middle of the rear side of the adjustment base.

[0005] Furthermore, a threaded sleeve is installed on the rear side of the adjusting base, and the threaded sleeve is threadedly installed on the screw rod. A ring is installed on the rear side of the adjusting base, and the ring is sleeved on the guide rail, and the guide rail is installed on the support frame. The ring and the threaded sleeve are symmetrically installed on the rear side of the adjusting base.

[0006] Furthermore, two movable grooves are symmetrically provided on the front side of the adjustment base, a guide plate is installed inside the movable groove, and an electric push rod is installed at one end of the guide plate located inside the movable groove.

[0007] Furthermore, the fixing part includes a handle, a round rod is installed on one side of the handle, two clamping blocks are symmetrically installed on the round rod, one end of the round rod is located inside the connecting plate, an installation slot is opened in front of the connecting plate, an installation block is installed in the installation slot, and a contact plate is installed on the side of the installation block away from the connecting plate.

[0008] Furthermore, a circular hole is provided on the insertion block, the diameter of the circular hole is the same as that of the round rod, two limiting holes are symmetrically provided on the insertion block, the two limiting holes are located outside the circular hole, the circular hole is communicated with the limiting groove, and a limiting groove is provided inside the insertion block.

[0009] Furthermore, the front side of the contact plate is connected to a busbar terminal, and the busbar terminal is mounted on the circuit breaker.

[0010] The beneficial effects of the utility model are as follows: the utility model is a contact mechanism for testing a circuit breaker, wherein a driving motor drives the screw rod to rotate, and the threaded sleeve will drive the adjusting base to move along with the rotation rate of the screw rod, and the collar installed above the adjusting base will move along the guide rail, and the collar and the threaded sleeve are symmetrically installed on the rear side of the adjusting base, and the screw rod drives the threaded sleeve to move, thereby driving the adjusting base to move, and the guide rail limits the movement range of the upper part of the adjusting base, so as to ensure that the adjusting base can drive the contact plate to move smoothly and horizontally inside the protective box.

[0011] One end of the guide plate is inserted into the movable groove, and the guide plate is driven by an electric push rod to move up and down in the movable groove, thereby changing the distance between the two contact plates, making it easier for the contact plate to fit with the busbar terminals of circuit breakers of different models.

[0012] Insert the installation block into the installation slot, and at the same time, turn the handle to adjust the position of the block, so that the round rod is inserted into the round hole, and insert the block from the limit hole into the limit slot. After the installation is completed, turn the handle to make the position of the block offset from the limit hole, fix the contact plate and the connecting plate, improve the efficiency of disassembly and assembly of the contact plate, and do not need the help of auxiliary tools. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0014] Figure 1 This is a schematic diagram of the overall structure of a contact mechanism for circuit breaker testing according to the utility model;

[0015] Figure 2 This is a schematic diagram of the internal structure of a protection box in a contact mechanism for circuit breaker testing according to the utility model;

[0016] Figure 3 It is a cross-sectional view of an adjustment base in a contact mechanism for circuit breaker testing of the utility model;

[0017] Figure 4 This is a schematic diagram of the overall structure of a connecting plate in a contact mechanism for circuit breaker testing according to the utility model;

[0018] Figure 5 It is a schematic diagram of the overall structure of a contact plate in a contact mechanism for circuit breaker testing according to the utility model;

[0019] In the figure: 1. Base plate; 2. Drive motor; 3. Protection box; 4. Ventilation box; 5. Detection window; 6. Support frame; 7. Screw; 8. Guide rail; 9. Adjustment base; 10. Guide plate; 11. Electric push rod; 12. Connecting plate; 13. Contact plate; 14. Ring; 15. Threaded sleeve; 16. Power supply box; 17. Moving groove; 18. Installation slot; 19. Handle; 20. Round rod; 21. Block; 22. Installation block; 23. Round hole; 24. Limit hole; 25. Busbar terminal. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0021] See also Figure 1-Figure 5The utility model provides a technical solution: a contact mechanism for circuit breaker testing, including a base plate 1, a protection box 3 is installed above the base plate 1, a ventilation box 4 is installed on the top of the protection box 3, a detection window 5 is opened on the front side of the protection box 3, a drive motor 2 is installed on one side of the protection box 3, a screw rod 7 is installed on the output end of the drive motor 2, the screw rod 7 is rotatably installed on a support frame 6, the bottom of the support frame 6 is fixedly installed on the base plate 1, an adjustment base 9 is installed on the screw rod 7, and electric push rods 11 are installed above and below the adjustment base 9, and the electric push rod 11 drives A guide plate 10 is installed at the end, and the guide plate 10 is installed on the adjusting base 9. A connecting plate 12 is installed in front of the guide plate 10. A fixing part is installed on one side of the connecting plate 12. The fixing part installs the contact plate 13 on the connecting plate 12. The front side of the contact plate 13 is connected to the busbar terminal 25, and the busbar terminal 25 is installed on the circuit breaker. A power supply box 16 is installed in the middle of the rear side of the adjusting base 9. The circuit breaker to be inspected can be sent into the protective box 3 through the detection window 5, so that the busbar terminal 25 on the circuit breaker fits the contact plate 13 and is inspected.

[0022] See also Figure 2 and Figure 3 A threaded sleeve 15 is installed on the rear side of the adjusting base 9, and the threaded sleeve 15 is threadedly installed on the screw rod 7. A collar 14 is installed on the rear side of the adjusting base 9, and the collar 14 is sleeved on the guide rail 8. The guide rail 8 is installed on the support frame 6. The collar 14 and the threaded sleeve 15 are symmetrically installed on the rear side of the adjusting base 9. Two moving grooves 17 are symmetrically opened on the front side of the adjusting base 9. A guide plate 10 is installed inside the moving groove 17. An electric push rod 11 is installed at one end of the guide plate 10 located inside the moving groove 17. Through the cooperation between the set threaded sleeve 15 and the screw rod 7, the driving motor 2 drives the screw rod 7 to rotate and at the same time drives the adjusting base 9 to move its position on the screw rod 7, so that the contact plate 13 is aligned with the busbar terminal 25 on the circuit breaker.

[0023] See also Figure 4 and Figure 5 The fixing part includes a handle 19, a round rod 20 is installed on one side of the handle 19, and two clamping blocks 21 are symmetrically installed on the round rod 20. One end of the round rod 20 is located inside the connecting plate 12, and a mounting slot 18 is opened in front of the connecting plate 12, and a mounting block 22 is installed in the mounting slot 18. A contact plate 13 is installed on the side of the mounting block 22 away from the connecting plate 12, and a circular hole 23 is opened on the mounting block 22, and the diameter of the circular hole 23 is the same as that of the round rod 20. Two limiting holes 24 are symmetrically opened on the mounting block 22, and the two limiting holes 24 are located outside the circular hole 23. The circular hole 23 is connected to the limiting groove, and a limiting groove is opened inside the mounting block 22. The round rod 20 can be inserted into the circular hole 23 through the provided handle 19, and the clamping block 21 is driven to rotate in the limiting groove, so that the position of the clamping block 21 and the limiting hole 24 are staggered, and the contact plate 13 and the connecting plate 12 are fixed, which is convenient for replacement when the surface of the contact plate 13 is worn.

[0024] Specific implementation method: the circuit breaker to be inspected is sent into the protection box 3 from the inspection window 5, the driving motor 2 drives the screw rod 7 to rotate, the threaded sleeve 15 will follow the rotation rate of the screw rod 7 to drive the adjustment base 9 to move, the ring 14 installed above the adjustment base 9 will move along the guide rail 8, the ring 14 and the threaded sleeve 15 are symmetrically installed on the rear side of the adjustment base 9, the screw rod 7 drives the threaded sleeve 15 to move, thereby driving the adjustment base 9 to move, the guide rail 8 limits the movement range of the upper half of the adjustment base 9, and keeps the adjustment base 9 able to drive the contact plate 13 to move horizontally smoothly inside the protection box 3, one end of the guide plate 10 is inserted into the moving groove 17, and the electric push rod 11 drives the guide plate 10 to move up and down inside the moving groove 17, thereby changing the distance between the two contact plates 13, so that the contact plate 13 is convenient for the contact plate 13 to fit with the busbar terminal 25 of circuit breakers of different models. After the bonding, the power supply box 16 supplies power, and the current enters from one side of the guide plate 10, is conducted into the circuit breaker through a pair of contacting contact plates 13 and busbar terminals 25, is conducted into another guide plate 10 from another pair of contacting contact plates 13 and busbar terminals 25, and then returns to the power supply box 16, forming a current loop, which achieves the detection function for the circuit breaker. The width of the insertion block 22 is smaller than the width of the installation slot 18, which is convenient for adjusting the position of the block 21 when the insertion block 22 is inserted into the installation slot 18. The insertion block 22 is inserted into the installation slot 18, and the handle 19 is rotated to adjust the position of the block 21, so that the round rod 20 is inserted into the round hole 23, and the block 21 is inserted into the limiting groove from the limiting hole 24. After the insertion is completed, the handle 19 is rotated to stagger the position of the block 21 with the limiting hole 24, and the contact plate 13 and the connecting plate 12 are fixed, thereby improving the efficiency of disassembly and assembly of the contact plate 13 without the aid of auxiliary tools.

[0025] Although this specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A contact mechanism for circuit breaker testing, comprising a base plate (1), characterized in that: A protection box (3) is installed above the base plate (1), a ventilation box (4) is installed on the top of the protection box (3), a detection window (5) is opened on the front side of the protection box (3), a drive motor (2) is installed on one side of the protection box (3), a screw rod (7) is installed on the output end of the drive motor (2), the screw rod (7) is rotatably installed on a support frame (6), the bottom of the support frame (6) is fixedly installed on the base plate (1), an adjustment base (9) is installed on the screw rod (7), electric push rods (11) are installed above and below the adjustment base (9), a guide plate (10) is installed on the driving end of the electric push rod (11), the guide plate (10) is installed on the adjustment base (9), a connecting plate (12) is installed in front of the guide plate (10), a fixing piece is installed on one side of the connecting plate (12), the fixing piece installs the contact plate (13) on the connecting plate (12), and a power supply box (16) is installed in the middle of the rear side of the adjustment base (9).

2. A contact mechanism for circuit breaker testing according to claim 1, characterized in that: A threaded sleeve (15) is installed on the rear side of the adjusting base (9), and the threaded sleeve (15) is threadedly installed on the screw rod (7). A collar (14) is installed on the rear side of the adjusting base (9), and the collar (14) is sleeved on the guide rail (8). The guide rail (8) is installed on the support frame (6). The collar (14) and the threaded sleeve (15) are symmetrically installed on the rear side of the adjusting base (9).

3. A contact mechanism for circuit breaker testing according to claim 1, characterized in that: Two movable grooves (17) are symmetrically provided on the front side of the adjustment base (9), a guide plate (10) is installed inside the movable groove (17), and an electric push rod (11) is installed at one end of the guide plate (10) located inside the movable groove (17).

4. A contact mechanism for circuit breaker testing according to claim 1, characterized in that: The fixing member comprises a handle (19), a round rod (20) is mounted on one side of the handle (19), two clamping blocks (21) are symmetrically mounted on the round rod (20), one end of the round rod (20) is located inside the connecting plate (12), a mounting slot (18) is provided in front of the connecting plate (12), a mounting block (22) is mounted in the mounting slot (18), and a contact plate (13) is mounted on a side of the mounting block (22) away from the connecting plate (12).

5. A contact mechanism for circuit breaker testing according to claim 4, characterized in that: The insert block (22) is provided with a circular hole (23), the diameter of the circular hole (23) being the same as that of the round rod (20), the insert block (22) being symmetrically provided with two limiting holes (24), the two limiting holes (24) being located outside the circular hole (23), the circular hole (23) being communicated with the limiting groove, and the insert block (22) being provided with a limiting groove inside.

6. A contact mechanism for circuit breaker testing according to claim 1, characterized in that: The front side of the contact plate (13) is connected to a busbar terminal (25), and the busbar terminal (25) is mounted on the circuit breaker.

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